This is one of the questions that I found in a comment posted to this blog:  does LSP layer supports port blocking?  My answer to this type of question is simply to direct you to Komodia’s free Winsock LSP guide and resource page.  It is going to be able to answer all of your Winsock LSP questions.  When you do find a problem that you either cannot answer or you do not want to spend the time to fix, then I want to point you towards Komodia’s Redirector.  With Komodia’s Redirector you can block Internet using Winsock and much more.

Chris